Doctor profile · Federal record
Dr. Keith Hsu, MD
Hospitalist Physician (CMS: Internal Medicine) · Mission Viejo, CA
- NPI 1891921458
- Accepts Medicare
- 18 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
26800 Crown Valley Pkwy, Suite 305
Mission Viejo, CA 926916384
(949) 364-6000
fax (949) 367-0518 - Mailing address
-
26800 Crown Valley Pkwy Ste 305
Mission Viejo, CA 926918017
Credentials & registration
- NPI registered
- June 2009 — 17 yrs on file
- Profile last updated
- October 28, 2020
- Year of graduation
- 2008 — 18 yrs since
- Specialty taxonomy
- 208M00000X — NUCC code
- State license (1)
- California #A110787C
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1891921458. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
733
Distinct HCPCS
5
Medicare allowed
$51,132
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 454 | 138 | $51 | |
99238 |
Hospital discharge day management, 30 minutes or less | 105 | 102 | $86 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 86 | 83 | $133 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 53 | 21 | $82 | |
99221 |
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 35 | 35 | $87 |
In context: peer comparison
Among 3 peers in this city , average services per provider: 93. This provider delivers 7.9× the peer median.Open Payments
Industry payments received
All-time total
$26
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 1 | $25.61 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
11
Patients
0
Total drug cost
$165
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 11 | 0 | $165 |
Hospital affiliations
Frequently asked questions
What is Dr. Keith Hsu's medical specialty?
Dr. Keith Hsu practices Hospitalist Physician in Mission Viejo, CA.
Where does Dr. Keith Hsu practice?
Dr. Keith Hsu practices at 26800 Crown Valley Pkwy, Mission Viejo, CA 926916384. Office phone: 9493646000.
What is Dr. Keith Hsu's NPI?
Dr. Keith Hsu's National Provider Identifier (NPI) is 1891921458, issued by NPPES.
Does Dr. Keith Hsu accept Medicare assignment?
Yes. Dr. Keith Hsu accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Keith Hsu commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with straightforward or low level of medical decision making (HCPCS 99231); Hospital discharge day management (HCPCS 99238); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.